Textile machinery



Aug 5 @4L .1. R. WYLDE ETAL 2,251,3N

TEXTILE MACHINERY Filed -May 8, 1940 Patented Aug. 5, 1941 TEXTILE MACHINERY Joseph Rowland Wylde and William Williams, Spondon, near Derby, England, assignors to Celanese Corporation of America, a corporation of Delaware 'Application May 8, 1940, Serial No. 333,880 n Great Britain June 23, 1939 3 Claims.

This invention relates to textile machinery and more particularly to spindles suitable for use in yarn twisting apparatus.

The invention is particularly applicable to the production of yarns or threads of high twist, especially crepe threads, such as are used in the manufacture of natural or articial silk crepe fabrics.

An object of the present invention is to produce yarns of greater uniformity of twist than has been possible prior to this invention.

According to the present invention a spindle adapted to support a yarn package to be rotated and protrude through the bore of the package, comprises a circular member formed on the protruding end of the spindle and a guide supported on the circular member in such a manner that it is capable of travelling circumferentially around the circular member, said guide being adapted to engage the yarn as it is drawn from the yarn package.

This construction of spindle is particularly useful when applied to the type of yarn twisting apparatus in which yarns are drawn from a rotating supply package supported on a spindle by a take-up package supported on and frictionally driven by a drum, the yarn passing from the rotating supply package over a balloon shaped path into engagement with the guide which is free to travel circumferentially around the circular member formed on the end of the spindle protruding through the supply package under the influence of the yarn unwinding from the supply package. The yarn then passes through suitable thread guides to the take-up package. The degree of twist imparted to the yarn is governed by the rate of rotation of the supply package and the rate at which the yarn is drawn off by the take-up package, the higher the rate of rotation of the supply package for a given rate of take-up of the yarn, the higher the degree of twist imparted to the yarn. It is found that this arrangement enables yarns with greater uniformity of twist to be produced.

The circular member may be in the form of a flanged disc to carry a guide in the form of a traveller similar to those used in ring spinning, the traveller embracing the flange of the flanged disc in a plane substantially at right angles to the plane of the disc and being capable of moving circumferentially around the flange in a manner analogous to the movement of the traveller around the ring in the well known ring spinning frame. The traveller according to the invention, however, rotates about the axis of the flanged disc inside the balloon to draw the yarn towards the flanged disc as the yarn unwinds from the rotating package, whereas in the ring spinning frame the traveller rotates about the axis of the ring outside the balloon to guide the yarn as it winds on to the rotating package.

The weight of the traveller can be varied to suit any particular denier and/or twist of yarn, thus enabling yarns to be twisted under conditions most favourable to their particular characteristics, with the result that even greater uniformity of twist is obtained. The traveller is cheap and is easily replaced when worn or when a traveller of different weight is required.

Conveniently the circular member is formed on a separate member provided with means for securing the member to the spindle; for example, the member may be provided with a screwed shank for engagement with a tapped hole provided in the end of the spindle, the screwed shank terminating in a shoulder adapted to abut the end of the spindle to position the member on the spindle. Such unit construction lends itself to the application of the present invention to existing twisting apparatus at very small cost.

The maximum diameter of the circular member is preferably sufficiently less than that of the spindle to allow the package to be accommodated to be easily slipped over the circular member, with the guide in position, into position on the spindle.

By way of example a form of spindle according to the invention will now be described in greater detail with reference to the accompanying drawing in connection with a twisting apparatus of the type described above.

In the drawing,

Fig. 1 is a diagrammatic side elevation of a twisting apparatus employing a spindle according to the invention; and

Fig. 2 is an enlarged View of the tip of the spindle shown in Fig. 1.

Referring to the drawing, a take-up package I supported on and frictionally driven by a drum 2 draws yarn 3 from a rotating bobbin 4 supported on and driven by a spindle 5, the spindle f 5 being driven by a belt Ii passing over a whorl 'I on the base of the spindle.

The tip of the spindle 5 is drilled axially to form a hole 8 which is tapped for the reception of the screwed shank 9 of a member II having a ilange I2 extending in both directions from a central disc I3. The screwed shank 9 terminates in a shoulder I4 abutting the end of the spindle 5, and controlling the distance between the flange I2 and the tip of the spindle. A slot I6 is provided in the member I l on the side of the flange remote from the screwed shank 9 for the purpose of screwing the member II into the spindle.

Embracing the flange I2 in a plane substantially at right angles to the plane of the disc I3 is a traveller II capable of moving circumferentially around the flange I2. The maximum diameter of the flange I2 is sufficiently less than that of the spindle 5 to allow the lbobbin 4 to be slipped easily over the ange I2, with the traveller I'I in position, into position on the spindle. During twisting, the yarn 3 passes from the rotating bobbin 4 through the traveller Il to a xed guide eye 22 from which it passes through a traversing guide 23 to the take-up package I. Whilst the yarn extending from the bobbin to the traveller I'I is free to be thrown outwards to follow a balloon shaped path under the influence of the rotating bobbin 4, the pull exerted on the yarn 3 by the rotating take-up package I, coupled with the drag on the yarn arising from the rotation of the bobbin 4, causes the traveller I'I to constrain the yarn 3 to make a sharp bend at the point where it passes through the traveller I'I. At the same time the traveller I1 is free to be dragged around the disc I2 by the yarn 3 as it unwinds from the rotating bobbin 4. Having described our invention what we desire to secure by Letters Patent is:

1. A spindle for yarn-twisting apparatus adapted to support a yarn package to be rotated and to protrude through the bore of the package, comprising a ring-and-tr'aveller device carried by the protruding end of the spindle, the ring being smaller in diameter than the spindle to allow the package to be slipped on and off the spindle with the ring in position. v

2. A spindle according to claim 1 wherein the ring is formed as a member separate from the spindle and is provided with means for securing it to the spindle.

3. A twist-controlling device adapted to be carried by the yarn package supporting spindle of a yarn-twisting apparatus comprising a ringand-trave'ller device smaller in diameter than such spindle, and means for attaching the device to the spindle.

JOSEPH ROWLAND VV'YLDE. WILLIAM WILLIAMS. 

